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  <dataset>
    <shortName>LIMNO_ALPS_PAR</shortName>
    <title>Lake Bonney Autonomous Lake Profiler and Samplers (ALPS): Photosynthetically Active Radiation</title>
    <creator>
      <individualName>
        <givenName>Peter</givenName>
        <surName>Doran</surName>
      </individualName>
      <electronicMailAddress>pdoran@lsu.edu</electronicMailAddress>
      <onlineUrl>https://www.lsu.edu/science/geology/people/faculty/doran.php</onlineUrl>
      <userId directory="https://orcid.org">https://orcid.org/0000-0002-3774-2847</userId>
    </creator>
    <creator>
      <individualName>
        <givenName>John</givenName>
        <surName>Priscu</surName>
      </individualName>
      <electronicMailAddress>jpriscu@montana.edu</electronicMailAddress>
      <userId directory="https://orcid.org">https://orcid.org/0000-0001-5807-6364</userId>
    </creator>
    <creator>
      <individualName>
        <givenName>Cristina</givenName>
        <surName>Takacs-Vesbach</surName>
      </individualName>
      <electronicMailAddress>cvesbach@unm.edu</electronicMailAddress>
      <onlineUrl>http://www.vesbachlab.org</onlineUrl>
      <userId directory="https://orcid.org">https://orcid.org/0000-0002-5535-2201</userId>
    </creator>
    <metadataProvider>
      <organizationName>McMurdo Dry Valleys LTER</organizationName>
      <onlineUrl>http://mcmlter.org/</onlineUrl>
    </metadataProvider>
    <associatedParty>
      <individualName>
        <givenName>Luke</givenName>
        <surName>Winslow</surName>
      </individualName>
      <phone phonetype="voice">608-821-3914</phone>
      <electronicMailAddress>lwinslow@usgs.gov</electronicMailAddress>
      <onlineUrl>http://cida.usgs.gov/people/lwinslow.html</onlineUrl>
      <role>field crew</role>
    </associatedParty>
    <associatedParty>
      <individualName>
        <givenName>Heather</givenName>
        <surName>Buelow</surName>
      </individualName>
      <address>
        <deliveryPoint>University of New Mexico</deliveryPoint>
        <city>Albuquerque</city>
        <administrativeArea>NM</administrativeArea>
        <postalCode>87131</postalCode>
        <country>US</country>
      </address>
      <electronicMailAddress>hnbuelow@gmail.com</electronicMailAddress>
      <onlineUrl>https://scholar.google.com/citations?user=Ut_MuNcAAAAJ&amp;hl=en</onlineUrl>
      <role>field crew</role>
    </associatedParty>
    <associatedParty>
      <individualName>
        <givenName>Jeff</givenName>
        <surName>Patriarche</surName>
      </individualName>
      <address>
        <deliveryPoint>334 Leon Johnson Hall</deliveryPoint>
        <city>Bozeman</city>
        <administrativeArea>MT</administrativeArea>
        <postalCode>59717</postalCode>
        <country>US</country>
      </address>
      <electronicMailAddress>j.patriarche@gmail.com</electronicMailAddress>
      <role>field crew</role>
    </associatedParty>
    <associatedParty>
      <individualName>
        <givenName>Maciej</givenName>
        <surName>Obryk</surName>
      </individualName>
      <address>
        <deliveryPoint>Cascades Volcano Observatory</deliveryPoint>
        <city>Vancouver</city>
        <administrativeArea>WA</administrativeArea>
        <postalCode>98683</postalCode>
        <country>US</country>
      </address>
      <electronicMailAddress>maciej.obryk@gmail.com</electronicMailAddress>
      <userId directory="https://orcid.org">https://orcid.org/0000-0002-8182-8656</userId>
      <role>field crew</role>
    </associatedParty>
    <associatedParty>
      <individualName>
        <givenName>Amy</givenName>
        <surName>Chiuchiolo</surName>
      </individualName>
      <address>
        <deliveryPoint>LRES, 334 Leon Johnson Hall</deliveryPoint>
        <city>Bozeman</city>
        <administrativeArea>MT</administrativeArea>
        <postalCode>59717</postalCode>
        <country>US</country>
      </address>
      <phone phonetype="voice">(406) 994-2360</phone>
      <phone phonetype="facsimile">(406) 994-5863</phone>
      <electronicMailAddress>achiuchiolo@montana.edu</electronicMailAddress>
      <role>lab crew</role>
    </associatedParty>
    <associatedParty>
      <individualName>
        <givenName>Jeff</givenName>
        <surName>Patriarche</surName>
      </individualName>
      <address>
        <deliveryPoint>334 Leon Johnson Hall</deliveryPoint>
        <city>Bozeman</city>
        <administrativeArea>MT</administrativeArea>
        <postalCode>59717</postalCode>
        <country>US</country>
      </address>
      <electronicMailAddress>j.patriarche@gmail.com</electronicMailAddress>
      <role>lab crew</role>
    </associatedParty>
    <associatedParty>
      <individualName>
        <givenName>Inigo</givenName>
        <surName>San Gil</surName>
      </individualName>
      <address>
        <deliveryPoint>Department of Biology, MSC03 2020 University of New Mexico</deliveryPoint>
        <city>Albuquerque</city>
        <administrativeArea>NM</administrativeArea>
        <postalCode>87131</postalCode>
        <country>US</country>
      </address>
      <phone phonetype="voice">(505) 277-2625</phone>
      <phone phonetype="facsimile">(505) 277-2541</phone>
      <electronicMailAddress>isangil@lternet.edu</electronicMailAddress>
      <role>data manager</role>
    </associatedParty>
    <pubDate>2017-02-14</pubDate>
    <language>English</language>
    <abstract>
      <section>
        <para>
          <literalLayout>Knowledge of the McMurdo Dry Valley (MDV) lakes is limited by winter access, a period which is most relevant in understanding the habitability of other icy worlds and critical to understanding the overall function of these lakes.&#160; Owing to the lack of winter access, data that normally require human presence are incomplete.&#160; Our goal was to conduct the first year-round investigation of the biogeophysics of these unique lakes.&#160; An important part of the McMurdo Long Term Ecological Research (LTER) is evaluating carbon and nitrogen budgets in perennial ice-covered lakes. This data set addresses this core area of research and quantifies the intensity of photosynthetically active radiation (PAR) at specific depths in McMurdo Dry Valley lakes.</literalLayout>
        </para>
      </section>
    </abstract>
    <keywordSet>
      <keyword>Antarctica</keyword>
      <keyword>lake</keyword>
      <keyword>light</keyword>
      <keyword>limnology</keyword>
      <keyword>PAR</keyword>
      <keyword>photosynthetically active radiation</keyword>
      <keywordThesaurus>Station Keywords</keywordThesaurus>
    </keywordSet>
    <keywordSet>
      <keyword>lakes</keyword>
      <keyword>light</keyword>
      <keyword>limnology</keyword>
      <keyword>photosynthetically active radiation</keyword>
      <keywordThesaurus>LTER Controlled Vocabulary</keywordThesaurus>
    </keywordSet>
    <intellectualRights>
      <section>
        <title>Data Policies</title>
        <para>
          <literalLayout>This data package is released under the Creative Commons Attribution 4.0 International License (CC BY 4.0; http://creativecommons.org/licenses/by/4.0/), which allows consumers (hereinafter referred to as “Data Users”) to freely reuse, redistribute, transform, or build on this work (even commercially) so long as appropriate credit is provided. Accordingly, Data Users are required to properly cite this data package in any publications or in the metadata of any derived products that result from its use (in whole or in part). A recommended citation is provided on the summary metadata page associated with this data package in the McMurdo Dry Valleys LTER Data Catalog (https://mcmlter.org/data), and a generic citation may be found on the summary metadata page in the repository where this data package was obtained. When these data contribute significantly to the contents of a publication, Data Users must also acknowledge that data were provided by the NSF-supported McMurdo Dry Valleys Long Term Ecological Research program (OPP-2224760). This data package has been released in the spirit of open scientific collaboration. Hence, Data Users are strongly encouraged to consider consultation, collaboration, and/or co-authorship (as appropriate) with the data package creator(s). Data Users should be aware these data may be actively used by others for ongoing research; thus, coordination may be necessary to prevent duplicate publication. Data Users should also recognize that misinterpretation of data may occur if they are used outside the context of the original study. Hence, Data Users are urged to contact the data package creator(s) if they have any questions regarding methodology or results. While substantial efforts are made to ensure the accuracy of this data package (with all its components), complete accuracy cannot be guaranteed. Periodic updates to this data package may occur, and it is the responsibility of Data Users to check for new versions. This data package is made available “as is” and comes with no warranty of accuracy or fitness for use. The creator(s) of this data package and the repository where these data were obtained shall not be liable for any damages resulting from misinterpretation, use, or misuse of these data. Finally, as a professional courtesy, we kindly request Data Users notify the primary contact referenced in the metadata when these data are used in the production of any derivative work or publication. Notification should include an explanation of how the data were used, along with a digital copy of the derived product(s). Thank you.</literalLayout>
        </para>
      </section>
    </intellectualRights>
    <distribution>
      <online>
        <url function="information">https://mcm.lternet.edu/content/lake-bonney-autonomous-lake-profiler-and-samplers-alps-photosynthetically-active-radiation</url>
      </online>
    </distribution>
    <coverage>
      <geographicCoverage>
        <geographicDescription>Lake Bonney is a saline lake with permanent ice cover at the western end of Taylor Valley in the McMurdo Dry Valleys of Victoria Land, Antarctica. It is 7 kilometres or 4.3 mi long and up to 900 metres or 3,000 ft wide. A narrow channel only 50 metres or 160 ft wide. Lake Bonney at Narrows separates the lake into East Lake Bonney 3.32 square kilometres or 1.28 sq mi and West Lake Bonney, 0.99 square kilometres or 0.38 sq mi. The west lobe is flanked by Taylor glacier. Valley: Taylor Distance to Sea : 25 Maximum Length (km): 4.8 Maximum Width (km): 0.9 Maximum Depth (m): 37 Surface Area (km^2): 3.32 Ice Thickness Average Surface (m): 3 - 4.5 Volume (m^3 * 10^6): 54.7</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.353210449219</westBoundingCoordinate>
          <eastBoundingCoordinate>162.536209106445</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.697700500488</northBoundingCoordinate>
          <southBoundingCoordinate>-77.724441528320</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>57</altitudeMinimum>
            <altitudeMaximum>57</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Lake Bonney is a saline lake with permanent ice cover at the western end of Taylor Valley in the McMurdo Dry Valleys of Victoria Land, Antarctica. It is 7 kilometres or 4.3 mi long and up to 900 metres or 3,000 ft wide. A narrow channel only 50 metres or 160 ft wide. Lake Bonney at Narrows separates the lake into East Lake Bonney 3.32 square kilometres or 1.28 sq mi and West Lake Bonney, 0.99 square kilometres or 0.38 sq mi. Valley: Taylor Distance to Sea : 28 Maximum Length (km): 2.6 Maximum Width (km): 0.9 Maximum Depth (m): 40 Surface Area (km^2): 0.99 Ice Thickness Average Surface (m): 2.8-4.5 Volume (m^3 * 10^6): 10.1</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.269104003906</westBoundingCoordinate>
          <eastBoundingCoordinate>162.354934692383</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.714805603027</northBoundingCoordinate>
          <southBoundingCoordinate>-77.727287292480</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>57</altitudeMinimum>
            <altitudeMaximum>57</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <temporalCoverage>
        <rangeOfDates>
          <beginDate>
            <calendarDate>2013-12-01</calendarDate>
          </beginDate>
          <endDate>
            <calendarDate>2015-12-14</calendarDate>
          </endDate>
        </rangeOfDates>
      </temporalCoverage>
    </coverage>
    <contact>
      <organizationName>McMurdo Dry Valleys LTER</organizationName>
      <onlineUrl>http://mcmlter.org/</onlineUrl>
    </contact>
    <publisher>
      <organizationName>McMurdo Dry Valleys LTER</organizationName>
      <onlineUrl>http://mcmlter.org/</onlineUrl>
    </publisher>
    <pubPlace>McMurdo Dry Valleys LTER</pubPlace>
    <methods>
      <methodStep>
        <description>
          <section>
            <para>
              <literalLayout>Through the ice, wire-walking profilers (McLane Labs Ice Tethered Profilers [ITPs]) were deployed in both lobs of Lake Bonney. Attached to the ITPs was a photosynthetically active radiation sensor (Biospherical instruments Model QCP23000). The ITPs were programmed to profile once daily around regional solar noon. A profile consisted of one downward and one upward movement to the furthest reach of the profilers possible movement, or the bottom of the lake or bottom of the ice, whichever limit came first. During the profiles, conductivity, temperature, salinity and dissolved oxygen readings were recorded every 10 seconds. To convert the raw sensor readings (recorded in sensor output units, millivolts), manufacturer calibration coefficients and fit equations were used.&#160;</literalLayout>
            </para>
          </section>
        </description>
        <instrumentation>Biospherical instruments Model QCP23000McLane Labs Ice Tethered Profilers&#160;</instrumentation>
      </methodStep>
    </methods>
    <dataTable>
      <entityName>ALPS_PAR_ELB</entityName>
      <entityDescription>Details on the PAR data containing spreadsheet (for the ALPS)</entityDescription>
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            </simpleDelimited>
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        </dataFormat>
        <distribution>
          <online>
            <url>https://mcm.lternet.edu/sites/default/files/data/ALPS_ELB_PAR.csv</url>
          </online>
        </distribution>
      </physical>
      <attributeList>
        <attribute>
          <attributeName>DATASET_CODE</attributeName>
          <attributeLabel>DATASET_CODE</attributeLabel>
          <attributeDefinition>A code to ID the data container.</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>A code to ID the data container.</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>LOCATION_NAME</attributeName>
          <attributeLabel>LOCATION_NAME</attributeLabel>
          <attributeDefinition>The lake where data was collected</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>The lake where data was collected</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>LOCATION CODE</attributeName>
          <attributeLabel>LOCATION CODE</attributeLabel>
          <attributeDefinition>The Lake code, according to the MCM LTER program.</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>The Lake code, according to the MCM LTER program.</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>DATE_TIME</attributeName>
          <attributeLabel>DATE_TIME</attributeLabel>
          <attributeDefinition>Date when data point was collected</attributeDefinition>
          <storageType>date</storageType>
          <measurementScale>
            <dateTime>
              <formatString>MM/DD/YYYY HH24:Mi:ss</formatString>
            </dateTime>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>PRESSURE</attributeName>
          <attributeLabel>PRESSURE</attributeLabel>
          <attributeDefinition>The recorded pressure in decibars,</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>decibar</customUnit>
              </unit>
              <numericDomain>
                <numberType>real</numberType>
              </numericDomain>
            </ratio>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>DEPTH</attributeName>
          <attributeLabel>Depth (m)</attributeLabel>
          <attributeDefinition>Depth at which sample was drawn from lake</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>meter</standardUnit>
              </unit>
              <precision>1</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">30</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>PAR</attributeName>
          <attributeLabel>PAR</attributeLabel>
          <attributeDefinition>Photosynthetically active radiation</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>microEinsteins/m^2/second</customUnit>
              </unit>
              <precision>0.001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">700</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>see comments column note</codeExplanation>
          </missingValueCode>
        </attribute>
      </attributeList>
    </dataTable>
    <dataTable>
      <entityName>ALPS_PAR_WLB</entityName>
      <entityDescription>Details on the PAR data containing spreadsheet (for the ALPS)</entityDescription>
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        <distribution>
          <online>
            <url>https://mcm.lternet.edu/sites/default/files/data/ALPS_WLB_PAR.csv</url>
          </online>
        </distribution>
      </physical>
      <attributeList>
        <attribute>
          <attributeName>DATASET_CODE</attributeName>
          <attributeLabel>DATASET_CODE</attributeLabel>
          <attributeDefinition>A code to ID the data container.</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>A code to ID the data container.</definition>
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          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>LOCATION_NAME</attributeName>
          <attributeLabel>LOCATION_NAME</attributeLabel>
          <attributeDefinition>The lake where data was collected</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>The lake where data was collected</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>LOCATION CODE</attributeName>
          <attributeLabel>LOCATION CODE</attributeLabel>
          <attributeDefinition>The Lake code, according to the MCM LTER program.</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>The Lake code, according to the MCM LTER program.</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>DATE</attributeName>
          <attributeLabel>DATE</attributeLabel>
          <attributeDefinition>Date when data point was collected</attributeDefinition>
          <storageType>date</storageType>
          <measurementScale>
            <dateTime>
              <formatString>MM/DD/YYYY</formatString>
            </dateTime>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>TIME</attributeName>
          <attributeLabel>TIME</attributeLabel>
          <attributeDefinition>Time when sample was collected</attributeDefinition>
          <storageType>date</storageType>
          <measurementScale>
            <dateTime>
              <formatString>HH24:Mi:SS</formatString>
            </dateTime>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>PRESSURE</attributeName>
          <attributeLabel>PRESSURE</attributeLabel>
          <attributeDefinition>The recorded pressure in decibars,</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>decibar</customUnit>
              </unit>
              <numericDomain>
                <numberType>real</numberType>
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        </attribute>
        <attribute>
          <attributeName>DEPTH</attributeName>
          <attributeLabel>Depth (m)</attributeLabel>
          <attributeDefinition>Depth at which sample was drawn from lake</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>meter</standardUnit>
              </unit>
              <precision>1</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">30</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>PAR</attributeName>
          <attributeLabel>PAR</attributeLabel>
          <attributeDefinition>Photosynthetically active radiation</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>microEinsteins/m^2/second</customUnit>
              </unit>
              <precision>0.001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">700</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>see comments column note</codeExplanation>
          </missingValueCode>
        </attribute>
      </attributeList>
    </dataTable>
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